Transcript Metro Ethernet Networks

SC441 Computer Networks – Independent Study
Boston University
Metropolitan
Ethernet
Networks
Estella Kang
Matt Powers
Metro Ethernet Networks
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Typically covers several hundred
miles of concentrated metropolitan
areas
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Explosion of Internet traffic and IP
services demand for rapid scalability
and dynamic functionality
SONET/SDH Implementation
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Metro core and metro access ring
topology
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ADM
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DACS
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TDM
SONET/SDH Constraints
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Complex, multi-tiered, hierarchical
network
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Limited Scalability
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Expensive
Metro Ethernet Networks
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Service and operational cost reduced
Scalable – up to 100Gbps
Simple – fewer protocol conversion
Services Provided by MEN
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Full suite of carrier-class Ethernet
services
Ethernet switching
Statistical multiplexing functionality
Bandwidth-on-demand service
Metro Ethernet Network
Advantages
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Service and management
Scalability
Network Reliability
Co-existence with existing
infrastructure
Topological flexibility
Reduction in operational and
network costs
Multi-Protocol Label
Switching (MPLS)
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Label switching to forward data by
mapping VLAN tags to label switched
paths (LSPs)
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Load sharing by switching path around
bottlenecks to less congested links
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Dedicated backup LSP and fast reroute
when a connection failure occurs
Questions?